The mode response of a steel truss bridge was analyzed by ANSYS and its seismic responses under transverse and longitudinal excitation were calculated using time-history analysis function.
通过利用ANSYS对某钢桁架桥进行了模态分析，并用时程分析法进行了在横桥向和竖桥向激励下的地震响应分析，得到了在关键截面的位移和杆件内力响应峰值。
In the present paper, the resonant response of a vertical mooring-line in case of neutrally buoyancy, for a given harmonic longitudinal excitation, is discussed. The law of stress-strain is nonlinear.
本文讨论垂直的中和浮力系留素在浮体的纵向激励处于谐振的情形下的共振响应问题，其中应力应变关系为非线性的。
A nonlinear parametric excitation equation is obtained for ships in longitudinal waves, and the dynamic stability is analyzed when the natural frequency of heave and roll are approximately equal.
本文建立了在纵浪上航行船舶的非线性参数激励横摇运动方程，研究了当升沉固有频率接近横摇固有频率时船舶的稳定性。
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